Eco-Marathon

More than 100 university and high school teams from across the U.S., Mexico and Canada compete in the Shell Eco-marathon to travel the furthest on the least amount of energy using energy sources ranging from diesel to solar.

Johnny Hanson/Houston Chronicle

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Kelsey Green a student at Granite Falls High School in Granite Falls, Wash., drives on the track during the Shell Eco-marathon at the George R. Brown Convention Center Saturday, April 26, 2014, in Houston. More than 100 university and high school teams from across the U.S., Mexico and Canada compete to travel the furthest on the least amount of energy using energy sources ranging from diesel to solar. The event continues through Sunday.

Johnny Hanson/Houston Chronicle

1of44

Kelsey Green a student at Granite Falls High School in Granite Falls, Wash., drives on the track during the Shell Eco-marathon at the George R. Brown Convention Center Saturday, April 26, 2014, in Houston. More than 100 university and high school teams from across the U.S., Mexico and Canada compete to travel the furthest on the least amount of energy using energy sources ranging from diesel to solar. The event continues through Sunday.